^^ Basicslly SDG just features the two of them growing closer as they fight their way through the Monokuma-infested city. It starts out with Touko being wary of Komaru because, you know, she's a psycho, and acts like she doesn't give a crap, but by the end she ends up proving she cares about Touko by saving her life when she didn't have to. Your basic frenemies-to-friends type of arc.